package org.apache.maven.repository.legacy.resolver.conflict;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.codehaus.plexus.PlexusConstants;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.annotations.Component;
import org.codehaus.plexus.component.annotations.Requirement;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.codehaus.plexus.context.Context;
import org.codehaus.plexus.context.ContextException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;

/**
 * A conflict resolver factory that obtains instances from a plexus container.
 *
 * @author <a href="mailto:markhobson@gmail.com">Mark Hobson</a>
 * @todo you don't need the container in here with the active maps (jvz).
 * @since 3.0
 */
@Component(role = ConflictResolverFactory.class)
public class DefaultConflictResolverFactory implements ConflictResolverFactory, Contextualizable {
  // fields -----------------------------------------------------------------

  /**
   * The plexus container used to obtain instances from.
   */
  @Requirement
  private PlexusContainer container;

  // ConflictResolverFactory methods ----------------------------------------

  /*
   * @see
   * org.apache.maven.artifact.resolver.conflict.ConflictResolverFactory#getConflictResolver(java.
   * lang.String)
   */

  public ConflictResolver getConflictResolver(String type) throws ConflictResolverNotFoundException {
    try {
      return (ConflictResolver) container.lookup(ConflictResolver.ROLE, type);
    } catch (ComponentLookupException exception) {
      throw new ConflictResolverNotFoundException("Cannot find conflict resolver of type: " + type);
    }
  }

  // Contextualizable methods -----------------------------------------------

  /*
   * @see org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable#contextualize(org.
   * codehaus.plexus.context.Context)
   */

  public void contextualize(Context context) throws ContextException {
    container = (PlexusContainer) context.get(PlexusConstants.PLEXUS_KEY);
  }
}
